85122949 | Genuine OEM Volvo / Mack SS1200UP Coalescing Air Dryer Assembly 12V

The Volvo / Mack SS1200UP Coalescing Air Dryer Assembly, part number 85122949, is designed for heavy-duty truck compressed-air systems. An air dryer removes moisture and contaminants from compressed air before it enters the vehicle's pneumatic system, helping protect air-brake components and support reliable operation. Verify the exact assembly configuration and voltage before ordering.

PRODUCT INFORMATION

• Part Number: 85122949

• Brand: Volvo / Mack — verify the manufacturer identification on the actual unit

• Model: SS1200UP

• Part Name: Coalescing Air Dryer Assembly

• Component Type: Air Dryer

• Voltage: 12V

• System: Compressed-Air / Pneumatic Brake System

• Assembly: Single Assembly

• Condition: Confirm the actual condition of the item before purchase.

APPLICATIONS

This SS1200UP air dryer assembly is intended for compatible heavy-duty truck compressed-air systems. Exact vehicle fitment for 85122949 depends on the vehicle configuration, air-system specifications, electrical connection, mounting arrangement, and OEM parts information.

Do not assume that all SS1200UP units are interchangeable. Confirm the part number and 12V specification against the existing unit before ordering.

FUNCTION

The air dryer helps remove moisture and contaminants from compressed air generated by the vehicle's air compressor. This helps protect pneumatic components from moisture-related corrosion, contamination, and freezing in cold operating conditions.

COMMON SIGNS OF AIR DRYER FAILURE

A worn, damaged, or failing air dryer may cause symptoms such as:

• Excessive moisture in air tanks.

• Water or contamination in pneumatic air lines.

• Frequent or abnormal purge cycles.

• Air leaks around the dryer assembly.

• Reduced air-system performance.

• Moisture-related issues affecting pneumatic brake components.

These symptoms may also be caused by compressor faults, air leaks, or other system problems. Diagnose the complete compressed-air system before replacing the dryer.

WHY REPLACE A VOLVO / MACK AIR DRYER?

A properly functioning air dryer helps protect the vehicle's compressed-air system by reducing moisture and contamination. Replacing a faulty assembly with the correct specification can help maintain air quality and support the reliable operation of pneumatic components.

FITMENT INFORMATION

Before purchasing Volvo / Mack 85122949, verify the part number, 12V electrical specification, connector type, mounting arrangement, and air-port configuration. Check compatibility using the vehicle VIN and an applicable OEM parts catalog.

Confirm that the replacement is the correct SS1200UP assembly for your particular truck. Similar model names or appearance do not guarantee interchangeability.

GENUINE OEM PART

This listing identifies the product as a Volvo / Mack SS1200UP coalescing air dryer assembly, part number 85122949. Verify the manufacturer's markings, authenticity, condition, and included components against the actual item and supporting documentation before publishing or purchasing.